30's calculated SLOW!!!
1936 Susa had first programing.
same year guy at Harvard
Iowa state John Atanasoff
Bell Labs George Stibits PTO1
1938 1st electronic Comp.COnstructed in 1939
BTL1 Inventor: George Stibitz Builder: Bell Labs Operational: 1939 Retired: 1949 Cost: $20,000
Speed: 0.2 operations per second
Z1 Memory 64 words
Zuse
Inventor: Konrad Zuse
Builder: konrad Zuse
Operational: 1941
Retired: 1944 (Destroyed)
Cost: $6500
Speed: 0.5 operations per second
Operations hardwired. Rebuilt in 1950
ABC
Inventor: John V. Atanasoff Builders: Atanasoff and Berry Operational 1942 Cost: $7000 Size 6' x 3' x 3'
Memory: 64 50 bit words
Speed: 32 operations per second
ASCC = Automated sequence controlled calculator
Inventor: Howard Aiken builder IBM Operational: 1943 Retired: 1959 Cost $500,000 Size: 51' x 8' x 8'
SSEC
User: Wallace Eckert Builder: IBM Operational: 1948
Memory 160 digits Speed 50 multiplications
1936 Susa had first programing.
same year guy at Harvard
Iowa state John Atanasoff
Bell Labs George Stibits PTO1
1938 1st electronic Comp.COnstructed in 1939
BTL1 Inventor: George Stibitz Builder: Bell Labs Operational: 1939 Retired: 1949 Cost: $20,000
Speed: 0.2 operations per second
Z1 Memory 64 words
Zuse
Inventor: Konrad Zuse
Builder: konrad Zuse
Operational: 1941
Retired: 1944 (Destroyed)
Cost: $6500
Speed: 0.5 operations per second
Operations hardwired. Rebuilt in 1950
ABC
Inventor: John V. Atanasoff Builders: Atanasoff and Berry Operational 1942 Cost: $7000 Size 6' x 3' x 3'
Memory: 64 50 bit words
Speed: 32 operations per second
ASCC = Automated sequence controlled calculator
Inventor: Howard Aiken builder IBM Operational: 1943 Retired: 1959 Cost $500,000 Size: 51' x 8' x 8'
SSEC
User: Wallace Eckert Builder: IBM Operational: 1948
Memory 160 digits Speed 50 multiplications